Steam-boiler furnace.



No. 870,090. PATENTED NOV. 5, 1907.-

w. J. ELLIS. STEAM BOILER FURNACE.

APPLICATION FILED MAB. 1, 1906. RENEWED SEPT. 12, 1907.

2 SHEETS-SHEET 1.

Ti, 3--l llNlTED STATE PATENT @Fhlfihh WILLIAM J. ELLI S, OF ANDREWS, NORTH CAROLINA, A SSIGN-OR OF ONF-HALF TO COLUMBUS W. SAVAGE, OF ANDREWS, NORTH CAROLINA.

STEAM-BOILER FURNACE.

Specification of Letters Patent.

Patented Nov. 5, 1907.

Application filed March 1. 1906. Serial No. 303.698- Renewed September 12. 1907. Serial 110392.571

To all whom. it may concern:

lic it known that 1, WILLIAM J. ELLIS. a citizen of the United States. residing at Andrews, in the county of therokce and State of North (arolina, have invented certain new and useful Improvements in Steam-Boiler Furnaces; and I do declare the following to be a full, clear. and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in steam boiler furnaces, and consists in the novel construction, combination and arrangement of devices hereinafter described and claimed.

Onc object of the invention is to provide an efficient and economical furnace of this character, in which the fuel will be continuously fed to the grate from a magazine which is located around the boiler so that the heat from the latter will turn the coal into coke before it reaches the grate.

Another object of the invention is to provide a furmice of this character having a fuel magazine with means for supplying air to the grate so that perfect combustion results.

A further object of the invention is to improve and simplify the construction and operation of furnaces of this character and thereby render the same more efiicicnt and economical.'

The above and other objects which will appear as the nature of the invention is better understood, are

accomplished by the construction illustrated in the the body 3 of the furnace, which is preferably con structed of masonry. As shown, the furnace body 3 consists of two side walls 4, front and rear end walls 56 and a top 7, the side and end walls being built upon a suitable foundation 8. The boiler 2, whichis in the form of a hollow cylindrical shell, extends through the end walls 5-6 and is arranged centrally in a space formed between the'side walls 4 and a horizontal partition 8 within the body 3. The lower portion 9 of this surrounding space forms the fire-box or combustion chamber of the furnace, and the upper portion 11 forms a fuel magazine or receptacle. The fire-box 9 extends longitudinally the full length of the furnace and its sides slope downwardly and inwardly to a centrally located longitudinally extending grate 12 arranged above a longitudinally extending ash-box l3 fornacd between two vertical longitiulinally extending partitons 14-15 provided beneath the horizontal partition 8 and thefurnace foundation. These partitions form between their outer faces and the inner faces of the lower portions of the side walls 4, longitudinally extending air passages or chambers l.()'17, which are in communication with the central chamber or space 13 through transverse recesses or openings 18 formed in the lower portions of the partitions 14-'l5. These transverse openings 18 in the two partitions are preferably arranged out of alinement with each other, as shown.

In the front walls of the furnace body are formed openings 19 which aline with the air passages 1( 'l7 and which are closed by doors 20. The latter are hinged as at 2], and are provided with suitable latches to hold them closed. In the front wall 5, betweenthe openings 19, is formed an opening 22 which alines with the central air chamber or ash-box 13 and through .which ashes are removed from the furnace. A door 23 is hingedly mounted at 24 to close the opening 22, as shown in Fig.

1. In the front wall 5 is also formed an opening 25, i

which is disposed slightly above the top of the grate l2 and which is closed by a hinged door 26. Suitable openings 27 are provided inthe top 7 of thefilrnace body, so that coal or other fuel may be discharged into the magazine or receptacles 11 and said openings are closed by doors 2 8, as shown in Fig. 3.

The steam boiler 2 comprises outer and inner cylindrical shells 2930, which are connected together at their ends and in the bottoms of which is formed a longitudinally extending opening 32, through which the flames and products of combustion from the fire upon the grate pass into the inner shell and from thence out through its open rear end, its forward end being closed by a head 33. A suitable steam dome 34 is provided upon the top of the boiler, and if desired, a steam gage may also be provided.

The construction, operation and advantages of the invention will be readily understood from the foregoing description taken in connection with theaccompanying drawings. It will be seen that the coal fed into the top of the magazine 11 will drop downwardly between the boiler and the side walls of the furnace and be supplied to the grate 12 in the form of coke, the heat from the fire and boiler causing the change. By providing the longitudinal air passages 1o17 upon each side of the I The opening 32 in the hollow boiler being disposed directly above the grate 12 causes the flames to spread throughout the inner shell of the boiler and effectively heat the water'within the same. i

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principleor sacrificing any of the ad- 7 vantages of the invention, as defined by the appended claims. I

Having thus described'my invention, what I claim as new and desire to secure by Letters Patent is:-

1" A steam boiler furnace comprising a body having a centrally-disposed, longitudinally-extending ash pit, longitudinally-extending passagesxupon opposite sides of said ash pit and in communication therewith, a combustion chamber and a fuel magazine forming the upper portion of said body, a grate above said ash pit, and a boiler in the upper portion of said body, having a flue opening through its bottom and disposed above said grate.

2. A steam boiler furnace comprising a body having side and end walls, a horizontal partition 8 and vertical partitions 14, 15, forming a central ash pit 13, and longitudinal air passages 16, 1'1, and having openings to establish communication between the ash pit and said air pissages, a combustion chamber 9, a fuel magazine 11, a grate in the partition 8", above the ash pit, doors to close the open front ends of the ash pit and air passages, and a steam boiler arranged horizontally in the fuel magazine 11 and combustion chamber 9 and having a longitudinallyextending flue opening through the bottom thereof and above said grate; substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

WILLIAM J. ELLIS.

Witnesses:

W. A. SAVAGE, H. M. WHITAKER. 

